baber/WOPTO huggingface dataset:
Patent GB-728861-A (GB)
Title: Improved flow regulator for a liquid
IPC: F02M1/00
Filed: 1953-03-03
Abstract: 728,861. Spray carburetters. SOC. D'EQUIPEMENTS ET MATERIELS AUXILIAIRES POTEZ SOC., AR.L. March 3, 1953 [May 9, 1952], No. 5844/53. Class 7(3). [Also in Group XXIX] A liquid fuel flow regulator comprises a constant level cup 4 with an outlet 34 leading to a removable and interchangeable throttling device 40 having an adjustable needlevalve 54. The device 40, which is retained within a boss 36 at the side of the cup 4 by a nut 46 and a set screw 48, has radial passages 51 opening to an air vent 56 and to an outlet pipe 39, and is fitted with an interchangeable orifice member 43 providing a seat for the needle valve. A float 31 connected by a lever 27 to a needle valve (not shown) at the inlet to the cup 4 maintains a constant head above the discharge orifice of the throttling device 40. Movement of the float below its normal level is limited by engagement of a flange 32 with an internal shoulder 33 in the cup. In a modification the throttling device comprises an adjustable, cylindrical member 72, Fig. 4, coacting with a vertical slit 67 and also having a plug 71 of superpolyamide, &c., which may be brought into engagement with a seat 70 to effect complete closure.
Patent GB-588751-A (GB)
Title: Improvements in and relating to the production of cellulose ethers
IPC: C08B13/02
Filed: 1945-03-09
Abstract: Cyanoethyl ethers of cellulose are obtained by reacting on viscose at a temperature not greater than 40 DEG  C. with at least 0.5 mol. of acrylonitrile per anhydroglucose unit present in the cellulose of the viscose.  The reaction may be effected by shaking the reactants together or by adding the acrylonitrile dropwise to the stirred viscose.  The solubility of the ethers so obtained is dependent upon the molar ratio between the cellulose in the viscose and the acrylonitrile, the proportion of caustic soda present in the viscose and the ripeness of the viscose.  With a molar ratio of cellulose to acrylonitrile of 1 : .5 to 1.2, alkali-soluble, water-insoluble ethers are obtained; with a molar ratio of 1 : 1.5 to 4.0 alkali-soluble, water-soluble ethers are obtained; and with a molar ratio of 1 : at least 4 water-insoluble ethers are obtained with a decreasing alkali solubility and increasing tendency for organic solvent, e.g. m-cresol, solubility as the ratio increases.  The proportion of caustic soda in the viscose should not exceed 10 per cent if water-soluble ethers are to be obtained using a molar cellulose-acrylonitrile ratio of 1 : 1.5-4.0, and should not exceed 15 per cent if ethers soluble in 10 per cent aqueous sodium hydroxide are to be obtained using a molar cellulose acrylonitrile ratio of 1 : 0.5-1.2. Water-soluble ethers are obtained from the reaction mixture by diluting with water, adding aqueous hydrochloric acid and then purifying the solution by dialysis in a regenerated cellulose casing to expel acid and sodium chloride.  The dialysed liquor is concentrated by vacuum distillation and treated with alcohol or acetone to precipitate the ether.  The ether is filtered off, washed with alcohol or acetone and air-dried.  Alternatively, the cellulose ether may be precipitated directly from the neutralized reaction mixture by adding alcohol or acetone.  The water-insoluble cellulose ether may be obtained by pouring the reaction mixture slowly into aqueous hydrochloric acid, and the precipitated ether is then washed with water, filtered, washed with alcohol or acetone and air-dried. The water-soluble ethers may be used as stabilizing and emulsifying agents, sizes and thickening agents for printing pastes.  They are also useful as protective colloids which act as granulating agents in the granular polymerization of unsaturated compounds such as, e.g. methyl methacrylate, acrylonitrile and diallyl maleate.  The water-insoluble ethers are useful as textile finishing agents. Both the water-soluble and water-insoluble ethers may be used for making filaments and films.  Numerous examples are given. Specifications 562,581 and 562,584 are referred to.
Patent GB-159224-A (GB)
Title: Improvements in or relating to propellers having variable and reversible helicoidal torsion or twist for aircraft
IPC: B64C27/473
Filed: 1921-02-21
Abstract: 159,224. Pateras Pescara, Raul, Marquis of. Feb. 21, 1920, [Convention date]. Screw propellers.-Relates to helicopter screw propellers particularly with blades of the biplane type and consists in providing screw gears for altering and reversing the incidence during flight, the deformation of the blade being progressive from root to tip. Each blade unit consists of a main longitudinal 28, Fig. 2, subsidiary longitudinals 26, 27, main ribs 20 attached to 28, and former ribs 23 attached to 26 and 27, an outer cover of fabric or sheet metal forming the surface. For changing the incidence, a series of worm and worm sectors 33 operated by a cable 34 is employed. Each sector is pivotally supported at 35, 36, Fig. 4, on the main longitudinal and the worm 40 is freely mounted on the forward longitudinal 26, arms from the worm passing to and encircling the main longitudinal. On tensioning the control cable, the relative position of the two longitudinals can be varied. By arranging the individual sectors with progressive pitches, the complete blade is given a progressive deformation from root to tip.
Patent GB-999631-A (GB)
Title: An improved shaft to bore fastening
Inventor: SECKERSON CLIFFORD ALEXANDER
IPC: G05G1/12
Filed: 1962-02-15
Abstract: 999,631. Circlips. F. T. PRODUCTS Ltd. Feb. 4, 1963 [Feb. 15, 1962], No. 5933/62. Heading F2H. A shaft 16 is secured rotatably in a bore 17, e.g. in a knob 18, by a resilient split tube which is tapered and sprung into a shaft neck 20, the knob having been pressed on to the shaft so that the larger end 15 of the tube bites into the bore wall. The tube may be part-circular in cross-section, Fig. 6 (not shown), or have curved arms 12, 13 joined by a flat web 11. The maximum diameter of the smaller end 14 of the tube is less than that of the bore 17, but the maximum diameter of the larger end 15 is larger. The diameter d, Fig. 1, of the inscribed circle of the tube's larger end 15 is less than the shaft diameter.
Patent GB-1360634-A (GB)
Title: Bolt keeper
IPC: E05B39/02
Filed: 1972-03-14
Abstract: 1360634 Sliding bolts ALBERT MARSTON & CO Ltd 14 March 1972 [3 March 1971] 5942/71 Heading E2A A bolt keeper, for use with a sliding bolt 46 spring biassed to the fastening position, has a socket 29 to receive the bolt and a release member 9 movable into the socket from the inner end thereof to push out the bolt and disengage it from the socket. The release member 9, which slides into the socket 19 between two guides 10, is operated by a key acting through a five-lever and bell work mechanisms 24, 21, 20, 19, 16. The sliding bolt 46 is carried by a frame 36 spring biassed against a glass plate 34 and the bolt 46 is released by operation of the release member 9 or by fracture of the plate 34 causing the frame 36 to move rightwardly, engaging a flange at the rear end of the bolt 46.
Patent GB-540178-A (GB)
Title: Process for the production of screen reflex copies by means of a separate covering screen and a separate light sensitive sheet
IPC: B65G47/00
Filed: 1940-04-03
Abstract: 540,178. Photographic reflex copying processes. NAAMLOOZE VENNOOTSCHAP CHEMISCHE FABRIEK L. VAN DER GRINTEN. April 3, 1940, No. 5994. Convention date, April 14, 1939. [Class 98 (ii)] In the production of reflex copies by means of a separate covering screen and a separate light-sensitive sheet, the covering screen has on the side to contact with the light-sensitive sheet a relief form which coincides with the screen figure, the transparent parts of the screen coinciding with the elevations of the relief. As shown in Fig. 1, the covering screen R in contact with the light-sensitive sheet B has a relief form in which the depths D are opaque and the elevations H transparent. The screen material may be hard, e.g. glass, and the light-sensitive material soft, e.g. plasticized cellulose derivatives. If gas is produced on exposure, the depths form continuous conduits. The screen may have the form shown in Fig. 3 to deflect part of the rays otherwise lost by reflection. The relief may be produced by etching or grinding a glass surface only lenticulating a plastic material. A relief formed on a glass plate by etching may be provided with a mirror surface, which is then removed from the elevations by polishing. The original is placed in a printing frame with the side to be reproduced uppermost, a light-sensitive diazotype film is placed on this with the sensitized surface uppermost, the screen is placed upon this with the screen side in contact with the sensitive layer, and the whole is pressed together by means of pressure or vaculm. The diazotype film consists of acetyl cellulose treated on a superficially saponified side with a diazo compound having a tertiary amino group in the pposition, such as p-diazoethylbenzylaniline. The exposure may be effected under a vertical arc lamp with a reflector. Specifications 425,126, 440,826, 440,868 and 447,390 are referred to.
Patent GB-369358-A (GB)
Title: An improved footstep for spindles and arbors
IPC: D01H7/04
Filed: 1931-02-26
Abstract: 369,358. Spindle footsteps applicable for cop-winding machines. BURGESS, S., 41, St. Vincent Place, Glasgow.-(Angus Co., Ltd. ; 3, Clive Row, Calcutta, India.) Feb. 26, 1931, No. 6016. [Class 120 (ii).] A footstep for a spindle' or arbor of the kind which is lifted relative to the footstep at the commencement of the winding operation, and lifts the footstep with it for the rest of the winding operation, being drawn downwards out of the cop on completion of the winding and then having a limited downward movement relative to the footstep, is characterized by the absence of any ball bearing and by the provision of means incorporated in the footstep for cushioning the shock on the spindle when it is moved downwards and suddenly arrested.. A bearing washer 5 is held in position by a nut 19 on the end of the spindle 4, the washer fitting closely in a recess 6 in the footstep 7. The upper end of the recess is closed by a nut 9 containing an oil cavity 10 which communicates by means of grooves 11 with an oil cavity 12. An oil reservoir 13 houses the nut 19. At the commencement of the winding operation the spindle which is resting on the shoulders 17 moves upwards in the footstep and forces oil into the cavity 10 from which it flows during the winding operation to lubricate the upper face of the washer 5, round the edges of which it slowly returns to the space A below the washer so that when the winding is finished and the spindle is depressed by pressure on the toe portion 8, the shock of the contact of the footstep with the buffer 16 is cushioned by the oil in A, which then gradually flows back round the sides of the washer as the spindle moves back to its rest position on the shoulder 17. If desired a small hole may be provided in the washer 5 to facilitate the passage of oil. The buffer 16 is carried on the foot-rail 15 supported on the bar 14 which guides the vertical movement of the footstep.
Patent GB-635185-A (GB)
Title: Improvements in or relating to the treatment of coffee
IPC: A23F5/22
Filed: 1948-02-27
Abstract: Caffeine is obtained from an aqueous infusion made from roasted coffee beans by mixing the infusion with a non-aqueous caffeine-solvent immiscible in water and having a specific gravity different from that of water and a boiling point below 100 DEG  C., mechanically separating the caffeine-containing solvent from the mixture and then separating the caffeine from the solvent by evaporation.  Suitable solvents are trichlorethylene, dichlorethylene, dichlormethane and benzene.
Patent GB-734100-A (GB)
Title: A novel isonicotinic acid derivative and process for the manufacture thereof
IPC: C07D213/86
Filed: 1953-03-06
Abstract: The invention comprises the chemotherapeutic compound, the isonicotinyl hydrazone of cinnamaldehyde.  It is prepared by condensing isonicotinyl hydrazine with the aldehyde, preferably at elevated temperature in a diluent, e.g. water, a lower alcohol or an aqueous alcohol.
Patent GB-816200-A (GB)
Title: Process for the separation of diisopropyl benzene dihydroperoxides
IPC: C07C409/12
Filed: 1958-02-26
Abstract: <PICT:0816200/IV (b)/1> Di - isopropylbenzene dihydroperoxide is separated from mixtures also containing diisopropyl benzene and its oxidation products by subjecting the mixture to the action of two solvents which move in counter-current and are only slightly mutually soluble, one being a non-alkaline, substantially neutral aqueous liquid containing 0-80 per cent methanol or ethanol and the other a liquid hydrocarbon.  The dihydroperoxide dissolves preferentially in the aqueous layer and high recovery yields are obtained by suitable adjustment of the extraction temperature and the ratios of extracting liquid and washing liquid (the hydrocarbon) to the amount of material to be extracted.  The washing liquid is preferably a saturated aliphatic or cycloaliphatic hydrocarbon of 5-7 carbon atoms, although aromatics, e.g. di-isopropyl benzene may be used, and is preferably present in a quantity approximately equivalent to that of the material to be extracted.  If the extracting liquid contains no alcohol the weight ratio of it to the amount of material to be extracted may be 20 : 1 to 5 : 1, preferably 15 : 1 to 10 : 1 and the extracting temperature 50-100 DEG  C., preferably 70-90 DEG  C.  When the extracting liquid contains 30-60 per cent methanol the weight ratio may be 10 : 1 to 1 : 1, preferably 5 : 1 to 2 : 1, and the extracting temperature 15-25 DEG  C.  The extraction may be carried out batchwise, e.g. in a system of fillers and separators or continuously, e.g. in an extraction column or in a rotating disc contactor, as shown in the Figure, where the mixture to be extracted enters a vessel 1 through line 5, the extracting aqueous liquid enters through 6 and leaves through 14 and the washing liquid (hydrocarbon) enters through 7 and leaves through 9.  The solvents are distilled off in vessels 10 and 15 and are recycled through 11 and 17 and separator 16.  The purified dihydro-peroxide is withdrawn through 21 and di-isopropyl benzene and its other oxidation products withdrawn through 13 for recycle to the oxidizer.  In the examples: (1) an oxidation product of m-di-isopropyl benzene containing 52.5 per cent monohydroperoxide and 15.6 per cent dihydroperoxide is treated batchwise using 1 : 1 water : methanol and n-hexane at 20 DEG C.; (2) a similar oxidation product is treated continuously in an apparatus similar to that described with 1 : 1 water : methanol and n-hexane at 20 DEG  C.; (3) a similar oxidation product is treated with water and m-diisopropyl benzene at 80 DEG  C. to show that there is no peroxide decomposition during the extraction.  Specifications 659,241, [Group VI], and 727,498 are referred to.
Patent GB-280417-A (GB)
Title: Improvements in lining constructions for galleries, tunnels or the like
IPC: E21D11/08
Filed: 1927-03-05
Abstract: 280,417. Schõfer, H. March 5, 1927. Tunnels. - Linings for galleries, tunnels, &c. comprise arches built of concrete, brick, &c. blocks or plates a and corrugated metal d covering the spaces between the arches. The blocks a may be of T, wedge, angle, U or rectangular form and may have reinforcements f ; they may be assembled without bonding or with a slight bonding c of iron or reinforced concrete. Collapsable insertions g may be provided in the arches or deformation of the arches may be provided for by the use of deformable bonding. The corrugated metal d may be arched outwardly towards the rock.
Patent GB-748680-A (GB)
Title: Electric motor
IPC: H02K7/10
Filed: 1954-03-03
Abstract: 748,680. Electric motor casings. STAMICARBON N.V. March 3, 1954 (Dec. 18, 1953], No. 6285/54. Class 35. In a motor with the rotor on a hollow shaft . connected by a coupling to the driven shaft passing through the hollow shaft the motor casing is closed apart from restricted passages provided for the flow of air under pressure differences caused by fluctuations in motor temperature, the passages being located to avoid air passage through the bearings which are sealed. As shown, seals 23, 24 and 25 prevent flow through the bearings which are bypassed for the restricted flow of air by passages 3, 19 and 21. Specificittion 748,679 is referred to.
Patent GB-122337-A (GB)
Title: Improvements in and relating to Medical Percussion Sounding-apparatus.
Inventor: HICKEY JOHN PHILIP
Filed: 1918-04-15
Abstract: 122,337. Hickey, J. P. April 15, 1918. Percussion sounding - apparatus for use in conjunction with a stethoscope o r phonendoscope for outlining the internal organs of the body comprises an electric buzzer or vibrator, the move. ments and sound of which are transmitted through a staff or striker. A pencil-holder is fitted to the appliance so that the positions at which it is applied may be marked on the body to obtain the outline of the internal organ. A casing 2 mounted on a handle A contains an ordinary electric buzzer 4, a switch 6 being provided on the handle. A staff or striking-member 5<1> is secured to the casing, and may be in contact with the lower ends of the magnets. A socket or holder 6' for a pencil 8 is provided on the casing. A removable tip 9 with a concave outer end may be fitted to the striker when the latter is applied to the spines of the vertebrµ or other joints. The tone and rapidity of the vibrations may be varied by adjusting a screw 11.
Patent GB-277561-A (GB)
Title: Improved combustion furnace
Filed: 1927-03-07
Abstract: 277,561. Verschueren, W. J. O. March 7, 1927.. Baffles.- The flow of combustion gases from the grate 1 is split up by an arch 3 in the chamber 2 into two vertical streams which are led into two horizontal passages a, b terminating directly opposite each other at such a distance apart that the gases strike against and mix with one another in a chamber c leading to the boiler or other place of use. The fuel is supplied through an opening 4 on to an inclined surface 5 where it is dried, and falls down a short step 7 on to a second inclined surface 8 from which it passes to the grate 1. Apertures 9 are provided in the side walls of the combustion chamber for the supply of secondary air, and forced draught may be supplied to the grate.
Patent GB-440073-A (GB)
Title: Improvements in or relating to sewage disposal
IPC: F23G7/00
Filed: 1935-02-28
Abstract: 440,073. Treating sewage ; manures. PORTEOUS, W. K., 6, Netherton Road, St. Margaret's, Twickenham, Middlesex. Feb. 28, 1935, No. 6372. [Class 111] Sewage sludge is heated under pressure in one of a battery of receptacles, while another receptacle is being filled and the output of a third is being partially cooled in a recuperator, and passed to a settling-tank where supernatant liquid is decanted. The residue from the settling-tank is mixed up and liquid then separated from it by filtering. The solid matter from the filter is broken up, dried, and fed to an incinerator, which supplies steam for the heater, or ground and used as fertilizer. Sludge from a pit a is forced by a pump b through a pipe d, forming part of a recuperator, and a multi-way valve e to one of a battery of heating-vessels f<1>, f<2>, f<3> while heated sludge is withdrawn from another of these vessels, through the valve e by a pump h and forced through a pipe j, also forming part of the recuperator, to one of a battery of settling-vessels k<1>, k<2>, k<3>. Liquid is decanted from the settling- vessels through pipes m<1>, m<2>, m<3>. The settling- vessels are fitted with devices for mixing the residue left therein previous to its discharge to filter-presses s<1>, s<2>, s<3>. The solid from the filter-presses is passed to a cake-breaker v, conveyer w, drier x, elevator y and a bunker z, whence it is fed to the furnaces of boilers 11. Flue gases from the furnaces are used to heat the recuperator and the drier x and steam from the boilers is used in the heating-vessels f<1>, f<2>, f preferably at a pressure of about 100 1bs. per square inch, or in steam engines driving electric generators. The liquid from the settling- vessels and the filter-presses may be led to a boiler feed-water heater o.
Patent GB-686469-A (GB)
Title: A process and apparatus for the recovery of sulphur from hydrogen sulphide
IPC: C01B17/04
Filed: 1950-03-14
Abstract: Elementary sulphur is recovered from gases containing in addition to hydrogen sulphide, gaseous nitrogen compounds such as cyanogen or ammonia, by burning the hydrogen sulphide with insufficient free oxygen to complete the formation of sulphur dioxide, at a temperature sufficient to decompose the nitrogen compounds (e.g. 1000 DEG C), and bringing the reaction products, which include free sulphur, into contact with a catalyst for the conversion of hydrogen sulphide and sulphur dioxide to sulphur. The gases are cooled before entry to the catalyst by passage through a boiler, the cooling being such that the dew point of the elementary sulphur vapour is not reached so that practically no sulphur is condensed before the gases are brought into contact with the catalyst at a temperature below 400 DEG C whereafter the total sulphur is precipitated in a liquid state by further cooling.  Oxygen-enriched air may be used for the combustion and a hydrogen sulphide content in the starting gas of 35-55 per cent is preferred.  The air, preferably preheated may be mixed with the hydrogen sulphide before entry to the heated reaction chamber as shown in Figs. 1 and 2, a mixture of air and hydrogen sulphide is injected into a heated reaction space 5 through burners 8 and after passing through a contact mass 17, the reaction gases are cooled in a boiler 20, the tubes of which may contain catalysts 23, additional to that of the subsequent main catalysis stage. The gases cooled to about 400 DEG C pass up pipe 25 to the catalyst 29 consisting for example of bauxite, and through a cooling chamber 31 to a further catalyst mass 33.  The gases are then cooled at 36 the liquified sulphur withdrawn at 38 and the uncondensed gases removed at 39.  The final cooling is preferably effected by means of air cooled U-shaped pipes arranged radially in tiers 36.
Patent GB-494393-A (GB)
Title: Suspensory
IPC: A61F5/40
Filed: 1938-03-01
Abstract: 494,393. Suspensory bandages. CARTLEDGE, J. J. March 1, 1938, No. 6423. [Class 81 (ii)] A suspensory comprises an elastic body band 1 forming a substantial angle at the point 2 which lies in front of the body, a pouch 3 joined at the top to the said band, and leg straps 4 joined at one end to the lower end of the pouch and at the other end to the meeting points 6 of the pouch and the band.